+
+function timehhmmss(val)
+ return (val:match("^[0-6][0-9]:[0-6][0-9]:[0-6][0-9]$") ~= nil)
+end
+
+function dateyyyymmdd(val)
+ if val ~= nil then
+ yearstr, monthstr, daystr = val:match("^(%d%d%d%d)-(%d%d)-(%d%d)$")
+ if (yearstr == nil) or (monthstr == nil) or (daystr == nil) then
+ return false;
+ end
+ year = tonumber(yearstr)
+ month = tonumber(monthstr)
+ day = tonumber(daystr)
+ if (year == nil) or (month == nil) or (day == nil) then
+ return false;
+ end
+
+ local days_in_month = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+
+ local function is_leap_year(year)
+ return (year % 4 == 0) and ((year % 100 ~= 0) or (year % 400 == 0))
+ end
+
+ function get_days_in_month(month, year)
+ if (month == 2) and is_leap_year(year) then
+ return 29
+ else
+ return days_in_month[month]
+ end
+ end
+ if (year < 2015) then
+ return false
+ end
+ if ((month == 0) or (month > 12)) then
+ return false
+ end
+ if ((day == 0) or (day > get_days_in_month(month, year))) then
+ return false
+ end
+ return true
+ end
+ return false
+end
+